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Question: 1
Define work and explain how work is calculted if force .Write Mathematically .
Answer: 1
1-26Work: Work is said to be done when a force displaces a body in its own direction.
Explain: In our daily life, when somene hold a body in state of rest no work id done because it does not cover any displacement, In the scientific sense, work is said to be done, when a force acts on a body there must be motion or displacementby a body in the direction of the force.
Mathematically:
Work = fore x displacment.
or
W = FS
Unit of work:
Work done is a scalar quantity and the SI unit of work is Joule ,denoted by 'J' and canbe defined as.
W= Fs
so, 1J = 1N , 1M
Or, 1 J = 1 Nm